d.
T
he refrigerant system is
abnormal.
17
PFC protection
a.
T
he PFC is failure;
b.
T
he outdoor drive board
is
failure
18
DC compressor
start failure
a.
T
he outdoor drive board
is
failure;
b.
T
he compressor is failure
19
Compressor
drive in trouble
a.
T
he outdoor drive board is
failure;
b.
T
he compressor is failure
c.
T
he outdoor control board
is
failure
20
★
Outdoor fan
motor locked
rotor protection
a.
b.
T
he connection of the
outdoor
fan motor is loose;
T
here are something block
the
outdoor fan;
c.
T
he fan motor is failure;
d.
T
he outdoor control board
is
failure
21
Outdoor coil
anti-overload
protection with
cooling
a.
b.
T
he refrigerant is too much;
T
he outdoor fan motor is
failure;
c.
T
he outdoor fan is broken;
d.
T
he condenser is dirty;
e.
T
he air inlet and air outlet of
the indoor unit and the
outdoor
unit is not normally
22
Compressor
pre heating
process
I
t is normal mode in
cold weather
24
Chip in outdoor
board in trouble
a.
Using the wrong drive board;
b.
Using the wrong compressor.
26
Overheated
outdoor radiator
a.
Radiator sensor fails
b.
Detection circuit of the
sensor on the control panel
fails
27
Protection
against too high
system
pressure
a.
The pressure switch
fails
b.
The pressure detection
switch on the control panel
fails
c.
The measured value of
system pressure exceeds
the limit
-
2
2
-
Summary of Contents for WHZ09SZA21S
Page 11: ...Refrigerant circuit Models WHZ09SZA21S and WHZ12SZA21S 10 ...
Page 41: ......